We choose Dynapro calipers over the more common and cheaper Dynalites because they're stiffer. But you can make them even better with a bridge bolt - they make the caliper approximately 10% stiffer.

You need to remove it in order to change pads, but it reinforces the weakest part of the caliper and increases the rigidity. This means better pedal feel with less flex and more precise threshold braking.

Fits the four-piston Dynapro as used on our NA/NB Big Brake kit, NC Little Big Brake Kit and ND Big Brake Kit. Not required on (and won't work with) the 6-piston Big Mama Jama kits.

This kit works for a handful of different calipers, so it comes with two bolts and two nuts that you won't use. It does include all of the parts you need for two calipers, which is one car in our case since we don't use Dynapro calipers on the rear brakes.